Noise Limits

[Doc]

I always thought a local authority would not let you build near it if your building would exceed noise limits, but in this case I just saw a third airport pop up at the edge of the map at a city which aleready had a limit of 13/15

The next closest town has a noise limit of 3 so it is not as if they managed to build in the authority area of another town.

Just wondering how this is possible.... does distance from town centre reduce noise contribution?

[Kyrre]

Yes in general they noise limits do stop new builds, but, the futher away you are fro a town centre, the less noise will be created by the new structure, for example, i can place the biggest airport (noise 25), suffiently far enough away to enable it be placed wehn noise is 23 (it's usually connected to a rail station so it's not actually as far away as it looks.

I suspect in your picture, the newest airport is sufficiently far enough away from that town centre for it to gain a noise reduction for itself; probably affecting itself as 2 instead of 5 noise.